Tents from a homeless encampment line a street in downtown Los Angeles, Jan. 26. Los Angeles city and county officials have approved sweeping plans to deal with homelessness at a cost of billions over a decade. The City Council's strategic plan calls for providing more housing and funding programs designed to keep people off the streets in the first place. The city has around 25,000 homeless, more than half the total in LA County.

“Even as our economy improves, we do not anticipate to have an additional $1.78 billion over the next 10 years to dedicate for this purpose,” Chief Administration Officer Miguel Santana told council members during a recent meeting.

City officials say it could generate nearly $17 million a year, far from enough to cover the costs of the project, though that number could increase if California voters decide to approve recreational marijuana later this year, Mashable reports.

“Marijuana is a new product in the marketplace and could be a significant source of new revenue,” says a recommendation in the proposal.

A number of other California cities have already adopted similar taxes on medical marijuana, including the municipalities of Riverside County, Santa Cruz, and Desert Hot Springs. The Los Angeles City Council will decide on the proposal by July.

If it’s approved, voters could see it on ballots either in November or in March.

L.A.’s housing project, which will be completed over ten years, will provide affordable housing and support services for residents, especially those who are chronically homeless.

But taxing medical marijuana could be controversial. Many patients strongly oppose taxing cannabis because they believe it creates an unfair burden on their decision to use a natural substance rather than prescription drugs to treat medical ailments.

They say taxing patients who take the drug to ease chronic pain could create economic hardships that drive many back to the black market.

“It will force people to go to the black market more," Dave Hodges, a proponent of recreational legalization who lives in San Jose, told LA Weekly. “You're talking a sin tax on people who are sick.”

The proposal is one of several other ideas to generate revenue for the project, including a plan to use General Obligation Bond that would let the city borrow the money and pay it back over 30 years, a billboard tax that could raise $24 million.

Another proposal calls for allowing developers to pay a fee to “opt out” of requirements that they build affordable housing units as part of new construction, with this fee then used to build affordable housing elsewhere. The city is also considered doubling the current tax on real estate sales, which could bring in an extra $167 million per year.